Trimming machine



L. J. CLAYTON. TRIMMING MACHINE. APPLICATION mzo JULY 29. 1920.

Patented Apr. 11, 1922.

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.Zivavnm 454/15 .1. 41.1mm

L.J. CLAYTON. TRIMMING MACHINE.

A P P L l C A T l O N F l L E D J U L Y 2 9 1 9 2 0.

Patented Apr. 11, 1922 5 SHEETS-SHEET 2- L. J. CLAYTON- I TRI'MMING MACHINE.

APPLICATION FILED lU LY29, 1920.

Patented Apr. 11, 1922'- 5 SHEETS-SHEET 3- Emmy LEN/J 4.00M

L. 1. CLAYTON. TRIMMING MACHINE APPLICATION FILED JULY 29, 1920- Patented Apr. 11,1922.

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L. J. CLAYTON.

TRIMMING MACHINE.

APPLICATlON FILED 1ULY29,1920.

Patented Apr. 11, 1922.

5 SHEETS-SHEET 5- uyi 3 1.

UNITED STATES PATENT OFFICE.

LEWIS JOHN CLAYTON, OF BOWMANVILLE ONTARIO, CANADA, ASSIGNOR TO GOOD- YEAR TIRE 8c RUBBER 00., OF CANADA LIMITED, OF NEW TORONTO, ONTARIO,

CANADA.

Specification of Letters Patent.

TRIMMING MACHINE.

Patented Apr. 11, 1922.

To all whom it may concern:

Be it known that I, LEWIS JOHN CLAYTON, resident of the town of Bowmanville, in the county of Durham, Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Trimming Machines, of which the following'is a specification.

This invention relates to improvements in trimming machines for trimming articles of various kinds of the type in which rotary trimming knives operate, trimming the edges of an article, and the objects of the invention are to enable the edges of both surfaces of the article to be trimmed without inverting the article, and to enable articles of material having concave or convex surfaces to be readily trimmed.

Further objects are to generally improve and simplify the construction of the trimming mechanism to better adapt the several parts to perform the functions required of them.

It consists essentially of the improved construction hereinafter described in detail in the accompanying specification and drawings. a

In the drawings V Figure 1 is a plan view of the invention. 7

Figure 2 is a perspective view of the same.

Figure 3 is a front elevation.

Figure 4 is a detail plan of the supporting frames of the knives.

igure 5 is a side view of the supporting frames.

Figure 6 is a side elevation.

Figure 7 is a plan view of the second supporting frame.

Figure 8 is a side view of the second supporting frame.

Figure 9 is a cross sectional view taken along the line w-w of Figure Figure 10 is a detailed elevation of the levers for the adjusting slide.

Figure 11 is a plan view of the mechanism shown in Figure 10. g

In the drawings, like characters of reference indicate corresponding parts in all the figures.

Referring to the drawings, A represents the base and B a suitable supporting frame.

of an embodiment C and D indicate the rotary co-operating rotating cutting lmives having their peripheries close together, designed to be rotated at a high speed, as is well known in the art, whereby when moved against the edge of an article they will trim the same.

The knives C and D are supported on parallel shafts E and F, which are supported from bearings 10 on suitable pivoted frames G and H.

The frames G and H are pivotally supported from the frame B being conveniently mounted on a crossshaft I supported by standards 12 and 13 on the frame, the frames G and H being loosely and pivotally mounted on the shaft I.

The knives are rapidly rotated by suitable means such as pulleys 1 1 which are connected by belts 15 with pulleys 16 on the shaft I, which shaft is driven by any convenient means to the desired speed.

To provide for exact longitudinal adjustment of the shafts E and F, the ends of the shaft extend through an arcuate slot 17 in the contact 18 on the frame, the shafts E and F being screw threaded at a distance from the end and having adjusting nuts 19 and 20 thereon, which bear against sleeves 21 and 22, which sleeves engage opposite sides of the contact 18. In this way a con tact of the cutting edges of the knives may always be held in exact adjustment.

The normal position of the cutting knives is controlled by an adjusting screw K which extends through both frames G and H having screw threaded engagement with frame -H and passing through a slot in frame G,

and a ball and socket connection 23 with a connecting member 24 which embraces a wedge member 25 adapted to be moved by engagement with an inclined slide 26, mounted to move longitudinally in suitable guide ways 27.

The slide 26 is connected as shown in Figures 10 and 11 with a link 28 which connects it with the extremity of the lever 29 mounted on a rotatable pin 30, mounted in the standard 13, and which has the opposite end connected to a lever 31 extending substantially vertically and connected at its upper extremity to a transversely extending link 32 which extends across the front of the machine, and is there pivotally connected to the operating lever L, which operating erated, it will swing the link 32 moving the.

lever 31 which is pivoted on 30. Through the movement of lever 31, lever 29 is set in motion, which through the link 28 will move the slide longitudinally thereby raising or lowering the screw K, which will raise or lower simultaneously the frames G and H, carrying the rotating knives, whereby the knives may be caused to trim. either the upper or lower surfaces of the articles, as hereinafter explained.

It will be observed that by using the link 28, the lever 29 is given a much greater throw than would be possible if it were connected to the slide 27.

The material to be operated upon, which may be an article composed of rubber, rubber compounds, papier mache, wood pulp products, leather, leather substitutes, fabric of all kinds and combinations of these materials is supported on a pivotally mounted work table M supported by a U-shaped member 3%, the extremities of which are pivotally mounted in the top of the standards 35 and 36,

The work table M carries a work supporting member 37 having a convex surface on which the article N to be trimmed is adapt ed to rest. The surface of this member is substantially spherical with a radius to suit the radius or curvature of the article to be trimmed, and the pivoting point of the member 34; is such that the work supporting member will turn about an axis extending through the point of contact 38 of the cutting knives, when in alternative position the work table being indicated in dotted linesin Figure 9.'

It will therefore be seen that no matter how the table is supported on its pivot, the point of contact 38 will always remain in the same position with reference to the cutting knives, and which will cause the article to be trimmed to always remain in similar relationship to the knives.

To hold the frames G and H in set and adjusted position a second screw may be provided extending through both frames having screw threaded engagement N and surrounded by a spring 39 which bears against the inner side of each frame.

For the same purpose a tension spring 40 may be provided extending between the frame H and the base A.

In operation the article to be trimmed is adjusted on the work supporting member 37, the lever operating will move the knives C and D simultaneously to trim either the upper or lower edge of the article.

The article illustrated on the supporting "member is a rubber heel formed convex on the surfaces, which will correspond to the curvature of the member 37.

It will be seen that the heel may be rapidly adjusted and moved on the table, while the edges of the upper and lower surfaces around the article are trimmed. Both surfaces may be trimmed without the necessity of inverting the article upon the table.

It will be further seen that the adjusting screw K will provide means by which'the movement of the knives will be made to accommodate articles of any desired thickness.

Owing to the fact that theoperating lever L is pivotally mounted on the work table M, it is possible in oneoperation to adjust the inclination of the work table as well as to rotatably adjust the position of the knives to cut the upper or lower edge of the article.

I am aware that it'is well known in the art to provide rotary cutting knives supported from pivoted frames adapted to'opcrate on the pivoted work table. Ido not claim this broadly, only various improvementshereinafter described in the claim.

Although the work table has been described as being formed with a convex surface, I may state that the invention may also be used with a work table having a concave surface.

It will be observed that the work supporting member 37 has a convex surface plate which is supported by two supporting plates extending at right angles to each other. The plane of one of these supporting plates contains the line of contact between the cutting knives and since the line of contact of the knives coincides with the axis on which the said plane hinges,the plane will always contain the contact line of the knives no matter in what position the said plane is tilted.

As many changes could. be made in the above construction, and-many apparently widely different embodiments of my invention, within the scope of the claim, constructed without departing from the spirit or scope thereof, it is intended that all mat-" ing rotary cutting knives, a shaft support ing the same, pivoted framessupporting the shaft, means for driving the shaft, and an adjusting member extending throughfthe frame, a slide controlling the posit-ion of in a trimming machine of the character the adjusting member, a pivoted lever, a I

link connecting the lever with the slide, a pin connected to the lever, a standard supporting the pin, a second lever connected to article to be trimmed Without reversing the article.

In Witness whereof I have hereunto set my hand in the presence of two Witnesses.

LEWIS JOHN CLAYTON.

\Vitnesses:

A. M. HARDY, J. S. COLE. 

